The figure portrays Kotobuki Tsumugi from Eiga K-ON! in Ending ver. (Singing!). She stands gracefully with a microphone in hand, mid-performance, capturing the warmth and charm of her stage presence. Her long hair is sculpted with gentle waves, flowing around her shoulders and catching light with subtle shading. She wears a stage-inspired outfit reminiscent of the Ending theme, featuring soft pastel tones, delicate ruffles, and a bow at the waist. Fine detailing on the dress, microphone, and tiny accessories adds life: glossy eyes, a serene smile, and a poised pose that suggests she is about to hit a heartfelt note. The base evokes a concert hall ambiance through understated support elements that keep the focus on her character. Overall, the sculpting conveys Mugi's gentle, reliable aura and her role as the ensemble's emotional center.

Kotobuki Tsumugi, known as Mugi, is the keyboardist of Ho-kago Tea Time, the friend whose dignified calm helps balance the group’s energy. In Eiga K-ON!, her character continues to offer warmth, loyalty, and musical support as the girls navigate the challenges of a concert film that blends friendship with performance. Mugi's quiet confidence and generous spirit reinforce the team's cohesion, while her moments on stage reveal a growing resolve to share her music with fans. Across the film's events, she provides emotional reassurance, technical proficiency at the keyboard, and a steady presence that anchors the group through moments of doubt and exhilaration. Her arc highlights the themes of collaboration, perseverance, and the joy of performing together.